1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2010 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 /* 24 * local device pathname for portable tape unit specification is returned 25 * if e is non-null then it is set to the next unused char in s 26 * 27 * <unit><density>[<no-rewind>] 28 * {0-7}[l,m,h,u,c][n] 29 */ 30 31 #include <ast.h> 32 33 char* 34 strtape(register const char* s, register char** e) 35 { 36 int mtunit = '0'; 37 int mtdensity = 0; 38 char mtrewind[2]; 39 char mtbehavior[2]; 40 41 static char tapefile[sizeof("/dev/Xrmt/123456789")]; 42 43 mtrewind[0] = mtrewind[1] = mtbehavior[0] = mtbehavior[1] = 0; 44 for (;;) 45 { 46 switch (*s) 47 { 48 case '0': 49 case '1': 50 case '2': 51 case '3': 52 case '4': 53 case '5': 54 case '6': 55 case '7': 56 mtunit = *s++; 57 continue; 58 case 'b': 59 case 'v': 60 mtbehavior[0] = *s++; 61 continue; 62 case 'l': 63 case 'm': 64 case 'h': 65 case 'u': 66 case 'c': 67 mtdensity = *s++; 68 continue; 69 case 'n': 70 mtrewind[0] = *s++; 71 continue; 72 } 73 break; 74 } 75 if (e) *e = (char*)s; 76 if (!access("/dev/rmt/.", F_OK)) 77 { 78 /* 79 * system V 80 */ 81 82 if (!mtdensity) mtdensity = 'm'; 83 sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt/ctape%c%s", mtunit, mtrewind); 84 if (!access(tapefile, F_OK)) return(tapefile); 85 for (;;) 86 { 87 sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt/%c%c%s%s", mtunit, mtdensity, mtbehavior, mtrewind); 88 if (!access(tapefile, F_OK)) return(tapefile); 89 if (!mtbehavior[0]) break; 90 mtbehavior[0] = 0; 91 } 92 } 93 else if (!access("/dev/nst0", F_OK)) 94 { 95 /* 96 * linux 97 */ 98 99 sfsprintf(tapefile, sizeof(tapefile), "/dev/%sst%c", mtrewind, mtunit); 100 } 101 else if (!access("/dev/nrmt0", F_OK)) 102 { 103 /* 104 * 9th edition 105 */ 106 107 switch (mtdensity) 108 { 109 case 'l': 110 mtunit = '0'; 111 break; 112 case 'm': 113 mtunit = '1'; 114 break; 115 case 'h': 116 mtunit = '2'; 117 break; 118 } 119 sfsprintf(tapefile, sizeof(tapefile), "/dev/%srmt%c", mtrewind, mtunit); 120 } 121 else 122 { 123 /* 124 * BSD 125 */ 126 127 mtunit -= '0'; 128 switch (mtdensity) 129 { 130 case 'l': 131 break; 132 case 'h': 133 mtunit |= 020; 134 break; 135 default: 136 mtunit |= 010; 137 break; 138 } 139 switch (mtrewind[0]) 140 { 141 case 'n': 142 mtunit |= 040; 143 break; 144 } 145 sfsprintf(tapefile, sizeof(tapefile), "/dev/rmt%d", mtunit); 146 } 147 return(tapefile); 148 } 149